OUTLINE: This is a dose-escalation study of interleukin-12-primed activated T cells (12ATC). Patients receive sargramostim (GM-CSF) subcutaneously (SC) on days 1-5 and undergo leukopheresis on day 6 to obtain peripheral blood mononuclear cells (PBMC). Patients treated at dose level 3 also undergo leukopheresis on day 7. The PBMC are treated with monoclonal antibody anti-CD3, interleukin-12 and interleukin-2 to form 12ATC. Patients receive chemo/immunotherapy comprising fluorouracil IV continuously over 24 hours on day 13 and GM-CSF and interferon alfa SC on days 17, 19, 21, 24, 26, and 28. Patients receive 12ATC IV over 15-30 minutes on days 31, 34, 38, 41, 45, and 48 and interferon alfa SC on days 35, 42, and 49. Cohorts of 3-6 patients receive escalating doses of 12ATC until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 2 of 3 or 6 patients experience dose-limiting toxicity. Patients are followed at 2 weeks, every 3 months for 1 year, and then every 6 months for 2 years.